<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../js/jquery-1.8.0.js" type="text/javascript"></script>

    <script language="javascript" type="text/javascript">
        $(document).ready(function () {
            // $("#select1").find("option[text='jack']").attr("selected",true);
            // $(".selector").find("option[text='jack']").attr("selected",true);
            //$("#select1 option[text='jack']").attr("selected", "selected");
           // $("#select1").find("option[value = 'jack']").attr("selected","selected");
            $("#select1").find("option:contains('jack')").attr("selected", true);
            //$("#select1").val("3");
        });

    </script>
</head>
<body>
<select  id="select1" class="selector" name="dd" style="width:100px;">
    <option value="1">tom</option>
    <option value="2">jack</option>
    <option value="3">hello</option>
    <option value="4">word</option>
    <option value="5">zhy</option>
</select>
</body>
</html>